Electronic apparatus and unit

ABSTRACT

An electronic apparatus has: a housing with a surface partially formed by a removably attachable lid; and a main-body connector disposed adjacent to an opening to be covered by the lid. A hard disk unit is removably inserted into the opening of the housing of the electronic apparatus. The hard disk unit has a unit connector to be mated with the main body connector. The hard disk unit includes an insulation sheet disposed between a circuit board and a support fitting. A part of the insulation sheet is extended and bent to spread on the rear surface of the support fitting so that connection between the connectors can be released when the extended part of the insulation sheet is pulled.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an electronic apparatus such as anotebook personal computer and a unit attachable to the electronicapparatus.

2. Description of the Related Art

An electronic apparatus such as a personal computer has multiplecomponents arranged in the housing and is typically configured asfollows. Among the multiple components, frequently replaced componentsare contained in a unit and can be replaced by changing the unit. Inorder to readily replace the unit, a removable lid is provided to form apart of the housing and the unit is disposed inside an opening coveredby the lid. A connector is disposed at the unit whereas anotherconnector to be mated therewith is disposed adjacent to the opening sothat electric connection between the unit and a circuit disposed in theapparatus can be established when the connectors are mated with eachother.

In recent years, performance of electronic apparatus represented bynotebook personal computers has been increased while the size and weightof such apparatus have been reduced. Therefore, multiple components arepacked in the housing of such apparatus. Under such circumstances, whenthe above-described structure is adopted, there arises a problem of howto readily insert and remove the unit within a small area because only aminimum area is available for the opening.

For example, Japanese Patent Application Publication No. 7-36562proposes such a structure that there is provided a fitting for enablinga user to release the connection between connectors by pulling thefitting.

Also, Japanese Patent Application Publication No. 4-48687 proposes sucha structure that a part of a flexible board in a unit is extended sothat the extended part can be used as a pull.

However, in the structure proposed by Japanese Patent ApplicationPublication No. 7-36562, an extra component to be used as a pull needsto be provided in a unit, making the structure complicated andincreasing the cost. In addition, it is necessary to provide a largerspace for such an extra component.

As for the structure proposed by Japanese Patent Application PublicationNo. 4-48687, an increase in the number of components can be avoidedbecause the flexible board is an essential element in the unit. However,since multiple circuit components and wires are arranged on the flexibleboard, they may be damaged when a pulling force is applied to theflexible board. When it is evident that the unit is failed, damage dueto such a force may not be a serious problem. However, when the unitneeds to be removed for maintenance or for the purpose of fixing filed acomponent disposed around the unit that is not failed, applying apulling force to the flexible board may cause another malfunction, whichis not desirable.

In view of the foregoing, the present invention provides an electronicapparatus having a readily removable unit without increasing the numberof components and lowering reliability.

SUMMARY OF THE INVENTION

The present invention provides an electronic apparatus including:

a connector provided in a main body; and

a unit which has a unit connector to be mated with a main-body connectorand is attachable to the electronic apparatus,

wherein the unit has a circuit board with circuit components mountedthereon one by one, an insulation sheet spread on the circuit board, anda support component disposed on the insulating sheet interposed betweenthe circuit board and the support component thereby providing a strengthto the unit, and

the insulating sheet has a flange section that is exposed on an edge inthe unit connector side and bent to spread on a rear surface of thesupport component, the flange section is capable of releasing connectionbetween the main-body connector and the unit connector by being pulledin a direction for moving the unit connector away from the main-bodyconnector.

The electronic apparatus of the invention has such a structure that apart of the insulation sheet disposed between the circuit board and thesupport fitting is extended to be spread on the rear surface of thesupport fitting and connection between the connectors is released bypulling such an extended part of the insulation sheet. The insulationsheet is an essential element providing insulation besides serving as apull and has no circuit components and wires disposed thereon.Therefore, only by extending a part of the insulation sheet, the unitcan be readily pulled out without disposing an additional component tobe used as a pull. In addition, because a thin sheet material can beemployed as the insulation sheet, space for the insulation sheet can beminimized in much the same way as conventional ones.

In the electronic apparatus according to the invention, preferably, thecircuit board includes a hard disk drive that contains and drives a harddisk.

Further, in the electronic apparatus according to the invention,preferably, the support component is a metal plate.

Furthermore, in the electronic apparatus according to preferably,preferably, the flange section has such a shape that a central portionthereof in the edge where the flange section is exposed is broader thanportions closer to both ends of the edge.

The flange section having such a shape makes it possible to prevent anundesired tilting force from being applied to the connector because theforce can be applied to the central portion and uniformly distributed ina lateral direction thanks to such a shape.

The invention can be achieved by the unit itself, which has thestructure described above and attached to the electronic apparatus.

As described above, the invention provides a readily removable unit andan electronic apparatus provided with such a unit without increasing thenumber of components and lowering reliability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram showing a display unit in open position;

FIG. 2 is a diagram showing the display unit in closed position;

FIG. 3 is an exploded perspective view of a portion of a main unit of anotebook PC, where a touchpad is disposed;

FIG. 4 is a perspective view of elements (A) through (D) shown in FIG.3, as viewed from back;

FIG. 5 is a diagram showing a state in which a stylus is in contact withthe touchpad;

FIG. 6 is a diagram showing the relationship between a digitizer and thetouchpad in terms of control;

FIG. 7 is another diagram showing the relationship between the digitizerand the touchpad in terms of control;

FIG. 8 is another diagram showing the relationship between the digitizerand the touchpad in terms of control;

FIG. 9 is a flowchart showing a process for avoiding a conflict betweendetection by the digitizer and detection by the touchpad;

FIG. 10 is a perspective view showing a corner of the rear end surfaceof the main unit, which corner is in the hinge section side;

FIG. 11 is a perspective view of a support fitting;

FIG. 12 is a plan view of the same portion shown in FIG. 10 with thesupport fitting being removed;

FIG. 13 is a perspective view of the same portion shown in FIG. 10 withthe support fitting being attached thereto, as viewed obliquely fromabove;

FIG. 14 is a perspective view showing one corner of the right flank ofthe main unit, which corner is in the hinge section side and is alsoshown in FIG. 1;

FIG. 15 is a perspective view of a support fitting;

FIG. 16 is a plan view of the same portion shown in FIG. 14 with thesupport fitting shown in FIG. 15 being removed;

FIG. 17 is a plan view of the same portion shown in FIGS. 14 and 16 withthe support fitting being attached thereto;

FIG. 18 is a diagram showing a part of the bottom surface of the mainunit;

FIG. 19 is a diagram showing an inner surface of a lid provided on thebottom surface;

FIG. 20 is a diagram showing the same portion shown in FIG. 18 with thelid being removed;

FIG. 21 is a diagram showing a hard disk assembly;

FIG. 22 is a diagram showing the hard disk assembly, in which a harddisk drive and a support fitting are separately shown;

FIG. 23 is a diagram showing the inside of a portion for accommodatingthe hard disk assembly with the lid being removed and the hard diskassembly being shifted to be removed;

FIG. 24 is a perspective view showing a corner of the rear end surfaceof the main unit, which corner is in the hinge section side, as viewedfrom the bottom of the main unit;

FIG. 25 is a diagram showing a lid shown in FIG. 24 alone;

FIG. 26 is a schematic diagram showing an inside structure with the lidshown in FIG. 24 being removed; and

FIG. 27 is a diagram showing an inner surface of the display unit towhich the rear surface of a display screen faces, with the displayscreen being removed.

DETAILED DESCRIPTION OF THE INVENTION

An embodiment of the present invention will be described.

1. Appearance

FIGS. 1 and 2 are perspective views of a notebook personal computer(hereinafter referred to as “notebook PC”) 10 according to an embodimentof the present invention. FIGS. 1 and 2 illustrate the notebook PC 10with a display unit 30 in an open state and a closed state,respectively.

The notebook PC 10 is composed of a main unit 20 and a display unit 30.Hinge sections 40 are provided to support the display unit 30 so thatthe display unit 30 can be opened and closed with respect to the mainunit 20.

The main unit 20 includes a substantially box-shaped housing equippedwith a power button 201, function buttons 202, a keyboard 203, atouchpad 204, a left-click button 205 and right-click button 206 for thetouchpad 204, a fingerprint sensor 207 and the like. Disposed on thefront end surface of the main unit 20 are a wireless LAN switch 208, aspeaker connection terminal 209, a microphone connection terminal 210and the like. The back of the touchpad 204 is overlaid with a digitizeras will be described later in detail. Further, disposed on the rightflank of the main unit 20 are a DC power connection terminal 211, threeUSB connectors 212, a media slot 213 into which various media (SD card™,xD card™, etc.) are removably inserted, a PC card slot 214 into which aPC card is removably inserted, a IEEE1394 connector 215 and the like.

Although not shown in figures, the main unit 20 includes a built-inmotherboard on which a CPU and various components are mounted. Themotherboard is substantially equal to the keyboard 203 in size anddisposed under the keyboard 203. Accordingly, the touchpad 204 and thedigitizer on the back thereof are positioned on a so-called palmrestsection of the main unit 20 avoiding an area covered by the motherboard.

The display unit 30 has a large-sized display screen 301 on the frontsurface thereof. Around the display screen 301, there are formedprojections 302 for preventing the display screen 301 from directlyabutting the top surface of the main unit 20 when the display unit 30 isclosed on the main unit 20.

The hinge sections 40 are so configured as to support the display unit30 in such a manner that the display unit 30 is openable and closablewith respect to the main unit 20. The hinge sections 40 are disposedapproximately at both ends of a laterally extending edge of the displayunit 30, which edge faces the main unit 20. In a portion of the edgebetween the hinge sections 40, there is formed a space for accommodatingcables that will be described later.

The display unit 30 needs to be rotatable with respect to the main unit20 and at the same time, it must be capable of remaining in any positionwhen the display unit 30 is open with respect to the main unit 20. Forthis purpose, the hinge sections 40 serve to apply friction so that thedisplay unit 30 can remain in any position when the display unit 30 isopen with respect to the main unit 20.

2. Touchpad and Digitizer

FIG. 3 is an exploded perspective view of a portion of the main unit 20of the notebook PC 10 shown in FIG. 1, where the touchpad 204 isdisposed. FIG. 4 is a perspective view of elements (A) through (D) shownin FIG. 3, as viewed from back.

On the top surface of the main unit 20 shown in FIG. 1, there appears asurface of the touchpad 204 shown in part (A) of FIG. 3. Under thetouchpad 204, a metal frame member 401 shown in part (B), a plasticsupport member 402 shown in part (C) and a digitizer 403 shown in part(D) are stacked in this order as shown in FIG. 3.

The touchpad 204 is configured to detect a movement or a position of afinger placed thereon by utilizing a change in the capacitance of aportion where the finger is placed, which change is caused by theplacement of the finger. The touchpad 204 is used to move a cursor onthe display screen 301 (see FIG. 1).

The metal frame member 401 supports the touchpad 204 disposed thereon.The metal frame member 401 also supports a circuit board 216 havingthereon: a switch 205 a for detecting the left-click button 205 beingpressed; a switch 206 a for detecting the right-click button 206 beingpressed; and a line sensor 207 a of the fingerprint sensor 207, whichcarries out actual detection of a touch.

The plastic support member 402 reinforces the digitizer 403 disposedthereunder and prevents a pressure applied on the touchpad 204 frombeing transmitted to the digitizer 403.

The digitizer 403 is capable of detecting a position and a movement ofthe tip of a stylus by utilizing magnetic effects caused by the stylustapped and moved on the touchpad 204. The digitizer 403 is used to inputhandwritten characters, graphics, etc. made by movements of the tip ofthe stylus on the touchpad 204. The aspect ratio of an area, in whichthe digitizer 403 can detect the position of the tip of the stylus whilethe tip of the stylus is moved on the touchpad 204, is equal to theaspect ratio of the display screen 301 shown in FIG. 1. This allows auser to input information by handwriting it on the touchpad 204 whilelooking at a position displayed on the display screen 301.

As described above, the main unit 20 has the touchpad 204 and thedigitizer 403 disposed thereon, which have different ways of detectinguser operations.

FIG. 5 is a diagram showing a state in which a stylus 50 is in contactwith the touchpad 204.

The stylus 50 has at the tip thereof a built-in resonance circuitcomposed of coil and capacitor. Resonance occurs in the stylus 50 uponreceipt of an electromagnetic force applied from the digitizer 50. Thedigitizer 403 is configured to detect a position of the tip of thestylus 50 by receiving the resonance. The stylus 50 also has a sensorfor detecting a pressure exerted by the tip of the stylus 50 andtherefore is capable of returning a modulated signal according to thedetected pressure to the digitizer 403 so that the digitizer 403 canalso detect the pressure. The stylus 50 may be provided with a pushbutton and configured to return a modulated signal in response to a pushof the button to the digitizer 403 so that the digitizer 403 can detectthe button being pushed.

The digitizer 403 and the stylus 50 start exchanging electromagneticsignals therebetween when the tip of the stylus 50 is tapped on thetouchpad 204. This is possible only when no large metallic body or thelike is disposed between a surface of the touchpad 204 and the digitizer403, which metallic body reduces a large amount of electromagneticforce. For this reason, as shown in FIG. 4, only a single connector 204a and separate wires 204 b connected to be used for the connector 204 aare disposed in a portion of a board within a detection-effective areawhere the tip of the stylus 50 can be detected by the digitizer 403. Inaddition, an LSI 204 c, which is a large block and serves as a circuitfor controlling the touchpad 204, is disposed in a portion of the boardoutside the detection-effective area. This layout is provided for thepurpose of preventing large reduction of electromagnetic force.

FIG. 6 is a diagram showing the relationship between the digitizer 403and the touchpad 204 in terms of control.

The digitizer 403 is provided with an induction-type sensor and thestylus. The digitizer 403 is also provided with a digitizer controllerthat receives an input signal generated by interaction between theinduction-type sensor and the stylus so that the digitizer can detectinformation such as a position of the tip of the stylus. Datarepresenting the result of the detection is input to a digitizer driver.According to the input data, the digitizer driver generates a directioncomponent representing the direction in which the tip of the stylus hasmoved and an appropriate command representing a switching operation andthe like. Subsequently, the digitizer driver transmits the generatedcomponent and the command to an operating system and controls a filterdriver that will be described later.

On the other hand, the touchpad 204 includes a capacitive touchpadsensor. The touchpad 204 also includes a touchpad controller thatreceives an input signal generated by interaction between the touchpadsensor and a finger in response to a touch of the finger on the touchpad204 so that the touchpad controller can detect a position of the finger.A press of the left-click button 205 and a press of the right-clickbutton 206 shown in FIG. 1 are also detected here. The touchpadcontroller inputs data according to the result of the detection into atouchpad driver. The touchpad driver transmits a command according tothe input data to the filter driver. Commands to be transmitted from thetouchpad driver to the filter driver are broadly divided into two types:command representing a direction component generated by a movement of afinger on the touchpad and command representing a press of theleft-click button 205 or right-click button 206. According to thecontrol by the digitizer driver, the filter driver transmits only asuitable command out of commands sent from the touchpad driver.Specifically, of a command representing a direction component sent fromthe touchpad driver and a command representing a button operation, thefilter driver prohibits or allows the transmission of the commandrepresenting the direction component to the operating system accordingto the control of the digitizer driver, which will be described belowmore in detail.

The operating system performs appropriate processing based on a commandsent from the digitizer driver and a command sent from the touchpaddriver passing through the filter driver.

FIG. 7 is another diagram showing the relationship between the digitizer403 and the touchpad 204 in terms of control. FIG. 7 shows a state inwhich the stylus is not in contact with the touchpad 204 and therefore,detection by the digitizer 403 is not performed.

In this case, the digitizer driver controls the filter driver under acondition that a direction component sent from the touchpad driver isalso valid. According to the control, the filter driver transmits both acommand representing the direction sent from the touchpad driver and acommand representing a button operation to the operating system.

FIG. 8 is another diagram showing the relationship between the digitizer403 and the touchpad 204 in terms of control. FIG. 8 shows a state inwhich detection by the digitizer 403 is performed.

In this case, the digitizer driver transmits a command representing adirection component and an ON/OFF state of a switch of a stylus to theoperating system when such a stylus is used, and also controls thefilter driver under a condition that the direction component from thetouchpad driver is invalid. According to the control, the filter driverprohibits the command representing the direction component of the movedfinger from being transmitted to the operating system even when thecommand representing the direction component of the moved finger is sentfrom the touchpad driver. At the same time, the filter driver transmitsto the operating system only a command representing a press of theleft-click button 205 or right-click button 206 sent from the touchpaddriver.

In this way, the control by the digitizer 403 and the control by thetouchpad 204 can be adjusted to prevent a conflict therebetween even ifa hand holding the stylus is brought into contact with the touchpad.Also, such a way of control prevents operation errors from occurring inthe touchpad during input operation using the stylus.

FIG. 9 is a flowchart showing a process for avoiding a conflict betweendetection by the digitizer and detection by the touchpad.

The process shown in FIG. 9 will be briefly described below since it hasbeen already described with reference to FIGS. 6 through 8.

In response to user operation on the digitizer, the digitizer controllertransmits data to the digitizer driver (step S11). Upon receipt of thedata, the digitizer driver transmits a command (step S12) andsubsequently, processing according to the user operation on thedigitizer is performed through the operating system.

On the other hand, in response to user operation on the touchpad, thetouchpad controller transmits data to the touchpad driver (step S21).Upon receipt of the data, the touchpad driver transmits a command to thefilter driver (step S22). The filter driver determines whether inputfrom the digitizer driver is present or absent (step S23). The filterdriver treats the command from the touchpad driver as a valid commandwhen input from the digitizer driver is absent (step S24). Subsequently,processing according to the user operation on the touchpad is performedthrough the operating system. However, when input from the digitizerdriver is present (step S24), the filter driver treats the command fromthe touchpad driver as invalid and treats only a command representingthe left-click button 205 or right-click button 206 as valid for thetouchpad (step S25).

As described above, the embodiment employs such a structure that thetouchpad is overlaid on the digitizer, which allows the touchpad and thedigitizer to share a common space thereby saving more space than a casewithout such an overlaid structure.

Further, the overlaid structure according to the embodiment enables auser to perform seamless operation by using both a hand and a stylus.For example, the user can carry out operation with the stylus whilestill holding the style, immediately after operation with the stylus.Therefore, the overlaid structure of the embodiment has improvedoperability further than a case without such an overlaid structure or acase with a display screen overlaid on a digitizer.

Furthermore, the overlaid structure according to the embodiment makes auser to readily notice that the touchpad and the digitizer cannot beused at the same time.

In addition, the embodiment employs such a structure that the touchpadand the digitizer are disposed approximately at the center in the widthdirection of the notebook PC 10, which allows both right-handed usersand left-handed users to readily operate the touchpad and the digitizer.

3. Security lock hole and USB connector

FIG. 10 is a perspective view showing a corner of the rear end surfaceof the main unit 20, which corner is in the hinge section side. The mainunit 20 shown in FIG. 1 has a housing composed of a top cover and abottom cover. FIG. 10 shows the bottom cover and the inside thereof withthe top cover being removed.

As shown in FIG. 10, a security lock hole 221 is formed in the bottomcover at a position closest to the corner. In addition, two USBconnectors 212 are disposed side by side next to the security lock hole221, and a modem connector 223 is disposed next to the security lockhole 221. All these connectors are amounted on the motherboard.

When an external connector 501 (see FIG. 12) capable of being mated witheither one of the two USB connectors 212 is inserted into or removedtherefrom, a force in a lateral direction is applied to the mated one ofthe two USB connectors 212. In order to sufficiently withstand theforce, the two USB connectors 212 are supported by a support fitting213.

The security lock hole 221 is a hole used for securing a locking devicethat restricts movements of the notebook PC 10. The locking device isprovided with a key section. Once the key section is inserted into thesecurity lock hole 221, the key section cannot be removed therefrom asit becomes large inside the security lock hole 221. In this way, themovement of the notebook PC 10 can be restricted.

FIG. 11 is a perspective view of the support fitting 213.

The support fitting 213 has a pressure plate 213 a for pressing andholding the two USB connectors 212, two divider walls 213 b and 213 cand a screw-fastened plate 213 d. The pressure plate 213 a has two holes213e, and the screw-fastened plate 213 d has a screw hole 213 f.

FIG. 12 is a plan view of the same portion shown in FIG. 10 with thesupport fitting 213 being removed.

The pressure plate 213 a of the support fitting 213 shown in FIG. 11serves to press and hold top surfaces 212 a of the respective two USBconnectors 212 so that these USB connectors 212 can withstand a forcethat may be accidentally applied thereto. Meanwhile, the top surfaces ofthe USB connectors 212 each have a projection 212 b that remains in aposition lower than the top surface of the external connector 501 whenthe external connector 501 is removed therefrom, and projects above thetop surface of the external connector 501 when the external connector501 is inserted therein.

As shown in FIG. 12, the two USB connectors 212 are disposed next toeach other such that the top surfaces 212a thereof become flush witheach other. The pressure plate 213 a of the support fitting 213 shown inFIG. 11 serves to press and hold the top surfaces 212 a being flush witheach other. The two holes 213 e of the pressure plate 213 a each serveas an escape section by receiving the projection 212 b of any of the USBconnectors 212 when it projects.

Depending on size of the external connector 501, the projection 212 bmay project greatly or slightly above the top surface 212 a when theexternal connector 501 is inserted. However, since the two holes 213 eof the pressure plate 213 a are formed to serve as an escape section,the external connector 501 in any size can be readily inserted orremoved and the two USB connectors 212 can be sufficiently secured in asimple structure.

FIG. 13 is a perspective view of the same portion shown in FIG. 10 withthe support fitting 213 being attached thereto, as viewed obliquely fromabove so that the back of the security lock hole 221 becomes visible.

The support fitting 213 is fixed on the bottom cover 222 by a screw 71.

In the state when the support fitting 213 is thus fixed, the dividerwalls 213 b and 213 c of the support fitting 213 serve as two wallsdefining a space around the security lock hole 221 in the inside of thehousing formed by the bottom cover 222 and the top cover (not shown).The divider walls 213 b and 213 c define the space in cooperation withinner walls 222 a of the bottom cover 222 and inner walls of the topcover.

The security lock hole 221 is formed for locking. However, many usersprovide their notebook PCs with no locking device. In this case, if thespace around the security lock hole 221 is not demarcated, dust willenter and settle in the inside of the housing thereby preventing aircooling or causing a short in a circuit resulting in malfunction.Therefore, the embodiment is configured to demarcate the space aroundthe security lock hole 221 with the support fitting 213 for supportingthe USB connectors 212, which makes it possible to prevent dust fromentering the inside of the housing without increasing the number ofcomponents.

FIG. 14 is a perspective view showing one corner of the right flank ofthe main unit 20, which corner is in the hinge section side and is alsoshown in FIG. 1. FIG. 14 shows the bottom cover and the inside thereofwith the top cover being removed.

FIG. 14 also shows the DC power connection terminal 211 and the threeUSB connectors 212 shown in FIG. 1. These USB connectors 212 aredisposed such that the top surfaces thereof become flush with oneanother.

The DC power connection terminal 211 and the three USB connectors 212are supported by a support fitting 214.

FIG. 15 is a perspective view of the support fitting 214.

The support fitting 214 has a front wall 214 a, a pressure plate 214 b,a terminal-retaining plate 214 c, a screw-fastened section 214 d and alink section 214 e. The front wall 214 a has openings 214 f for the USBconnectors 212. The pressure plate 214 b has three holes 214 g servingas escape sections by receiving three projections 212 b (see FIG. 16) ofthe respective USB connectors 212 and serves to press and hold the topsurfaces of the USB connectors 212. The terminal-retaining plate 214 cserves to press and hold the DC power connection terminal 211. Thescrew-fastened section 214 d has a hole 214 h used for screw fastening.The link section 214 e serves to link the pressure plate 214 b, theterminal-retaining plate 214 c and the screw-fastened section 214 d.

FIG. 16 is a plan view of the same portion shown in FIG. 14 with thesupport fitting 214 being removed. FIG. 17 is a plan view of the sameportion shown in FIGS. 14 and 16 with the support fitting 214 beingattached thereto.

The support fitting 214 is fixed to the bottom cover with a screw 72.

As described above, the three USB connectors 212 have the respectiveprojections 212 b. Each of the projections 212 b remain in a positionlower than the top surface of an external connector 501 when theexternal connector 501 is removed therefrom, and projects above the topsurface of the external connector 501 when the external connector 501 isinserted therein.

The pressure plate 214 b of the support fitting 214 shown in FIG. 15 hasthree holes 214 g each serving as an escape section by accepting thecorresponding one of the projections 212 b of the three USB connectors212. Because such an escape section (hole 214 g) is provided, theexternal connector 501 in any size can be readily inserted or removedand the three USB connectors 212 can be securely fixed. In addition, thesupport fitting 214 alone can simultaneously support both the DC powerconnection terminal 211 and the three USB connectors 212 as shown inFIG. 17.

4. Hard Disk Structure

FIG. 18 is a diagram showing a part of the bottom surface of the mainunit 20, and FIG. 19 is a diagram showing an inner surface of a lid 431provided on the bottom surface.

FIGS. 18 and 19 both show the lid 431 for covering a portion where ahard disk assembly is disposed. The lid 431 forms a part of the bottomcover of the main unit 20 and is removably attached thereto.

FIG. 20 is a diagram showing the same portion shown in FIG. 18 with thelid 431 being removed.

In this portion, a hard disk assembly 440 is disposed. The hard diskassembly 440 is a unit including a hard disk drive 441. The hard diskdrive 441 contains a hard disk serving as a large-capacity storagemedium, and reads and writes information from and onto the hard diskwhile rotating the disk.

FIG. 21 is a diagram showing the hard disk assembly 440 alone.

FIG. 21 shows the hard disk drive 441 and an insulating sheet 442 thatcovers the top of a circuit board of the hard disk drive 441. Only aflange section 442 a of the insulating sheet 442 is shown in FIG. 21,which will be described later. FIG. 21 also shows a support fitting 443for increasing the strength of the hard disk drive 441 and used forattaching the hard disk drive 441 to the main unit 20. Further, FIG. 21shows a connector 444 fixed at one end of the circuit board of the harddisk drive 441 and used for electrical connection with a connectormounted on the motherboard in the main unit 20.

FIG. 22 is a diagram showing the hard disk assembly 440, in which thehard disk drive 441 and the support fitting 443 with the insulatingsheet 442 attached thereto are separately shown. FIG. 22 shows a surfaceof the support fitting 443 (a surface of the insulating sheet 442) to bein contact with the circuit board of the hard disk drive 441.

The support fitting 443 is a conductive metal plate component.Therefore, if the support fitting 443 is directly disposed on thecircuit board, the support fitting 443 will cause a short in a circuiton the circuit board resulting in a malfunction. For this reason, thesupport fitting 443 is laid on the hard disk drive 441 with theinsulating sheet 442 interposed therebetween.

The insulating sheet 442 serves to keep insulation between the hard diskdrive 441 and the support fitting 443 and has the flange section 442 a.As shown in FIG. 21, the flange section 442 a is a portion spread on theback surface of the support fitting 443 from an edge in the connector444 side.

As shown in FIG. 21, the flange section 442 a has such a shape that acentral portion thereof is broader than portions closer to both ends ofthe edge where the flange section 442 a is exposed.

FIG. 23 is a diagram showing the inside of a portion for accommodatingthe hard disk assembly 440 with the lid 431 being removed and the harddisk assembly 440 being shifted to be removed.

FIG. 23 illustrates the inside of a part of the main unit 20, where anopening 432 to be covered by the lid 431 is formed. The hard diskassembly 440 is disposed inside the opening 432 and a connector 433 isdisposed adjacent to the opening 432 to be mated with the connector 444of the hard disk drive 441. By pulling the flange section 442 a of theinsulating sheet 442 in the state when the connectors 433 and 444 aremated with each other, the connector 444 of the hard disk drive 441 canbe disconnected from the connector 433 of the main unit 20 and therebythe hard disk drive 441 can be removed.

As described above, the central portion of the flange section 442 a isbroader and is usually held by a user while being pulled. Therefore, aforce is uniformly applied to the connector 444 in the lateral directionand it is possible to prevent excessive force from being applied in aslating direction.

The opening 432 has space barely enough for the hard disk assembly 440.However, the flange section 442 a is formed by extending a part of theinsulation sheet 442 so that the hard disk assembly 440 can be removedby pulling the flange section 442 a, thereby improving operability whensuch removal is necessary. The flange section 442 a is an extension ofthe insulation sheet 442. The insulation sheet 442 is an essentialelement and therefore, there is no need to provide an additionalcomponent to be used as a pull. Besides, because the insulation sheet442 is a thin material, there is no need to provide extra space for apull.

5. Wiring Structure Outside Hinge Section

FIG. 24 is a perspective view showing a corner of the rear end surfaceof the main unit 20, which corner is in the hinge section side, asviewed from the bottom of the main unit 20.

FIG. 24 illustrates the security lock hole 221 and the two USBconnectors 212 which are also shown in FIG. 13. Because FIG. 24 is aview seen from the bottom of the main unit 20, the security lock hole221 and the two USB connectors 212 are aligned in a direction oppositeto that in FIG. 13. Next to these USB connectors 212, the modemconnector 223 is disposed. FIG. 24 also shows a removably attachable lid451.

FIG. 25 is a diagram showing the lid 451 alone.

The lid 451 has an opening 451 a for the modem connector 223 shown inFIG. 24 and two screw holes 451 b.

FIG. 26 is a schematic diagram showing an inside structure with the lid451 being removed.

A portion to be covered by the lid 451 is so formed as to sink at adepth equal to the thickness of the lid 451, so that the lid 451 becomesflush with the bottom surface of the main unit 20 when the lid 451 isput thereon.

FIG. 26 illustrates two cables 460 extending from the display unit 30 tothe main unit 20 while running through the outside of the hinge section40 shown in FIG. 1. The cables 460 each have an end in the main unit 20side, which is not wired yet.

The main unit 20 has a vertically extending (in the thickness directionof the main unit 20) guide channel 452 for vertically guiding the cables460. The main unit 20 also has a wing 454 for covering a side of thechannel 452 while leaving a slit 453. The slit 453 has a width equal tothe diameter of the cable 460 so that the cables 460 can be insertedinto the channel 452 through the slit 453 from the side.

Thus, the cables 460 extending in the lateral direction from the displayunit 30 are vertically guided by the channel 452 while making a curve.The slit 453 is formed in the inner side of the curve made by the cables460 whereas the wing 454 is formed to cover the outer side of the curve.The cables 460 laterally extending from the display unit 30 tend tolinearly extend due to rigidity thereof and therefore, the cables 460stay in the side away from the slit 453 within the channel 452.Accordingly, it is possible to prevent the cables 460 from coming offthrough the slit 453.

As described above, the embodiment employs such a structure that thecables 460 running outside the hinge section are received and verticallyguided by the channel 452. Thanks to such a structure, it is possible toprevent the cables 460 from running off the correct route in a stagewhen the end of the cable 460 is connected to a circuit in the main unit20, specifically, in a stage when the end is connected to a circuitmounted on the bottom surface of the motherboard built in the main unit20, or in a stage when the lid 451 shown in FIG. 25 is finally put on.Accordingly, assembly performance has been improved.

FIG. 27 is a diagram showing an inner surface of the display unit 30 towhich the rear surface of the display screen 301 faces, with the displayscreen 301 being removed. Disposed on an upper part of the display unit30 are two antennas 461 used for wireless communication. The twoantennas 461 are each connected to corresponding one of the two cables460.

The cables 460 are disposed to downwardly extend until they come to aposition closer to the hinge section 40 and then run outside the hingesection 40 as shown in FIG. 26 after passing through an opening formedin the housing of the main unit 20. Subsequently, the cables 460 areguided by the channel 452 and connected to a circuit, which is disposedon the bottom surface of the motherboard built in the main unit 20 andused for wireless communication by way of the antennas 461.

1. An electronic apparatus comprising: a connector provided in a mainbody; and a unit which has a unit connector to be mated with a main-bodyconnector and is attachable to the electronic apparatus, wherein theunit has a circuit board with circuit components mounted thereon one byone, an insulation sheet spread on the circuit board, and a supportcomponent disposed on the insulating sheet interposed between thecircuit board and the support component thereby providing a strength tothe unit, and the insulating sheet has a flange section that is exposedon an edge in the unit connector side and bent to spread on a rearsurface of the support component, the flange section is capable ofreleasing connection between the main-body connector and the unitconnector by being pulled in a direction for moving the unit connectoraway from the main-body connector.
 2. The electronic apparatus accordingto claim 1, wherein the circuit board includes a hard disk drive thatcontains and drives a hard disk.
 3. The electronic apparatus accordingto claim 1, wherein the support component is a metal plate.
 4. Theelectronic apparatus according to claim 1, wherein the flange sectionhas such a shape that a central portion thereof in the edge where theflange section is exposed is broader than portions closer to both endsof the edge.
 5. A unit attachable to an electronic apparatus,comprising: a unit connector to be mated with a main-body connector whenthe unit is attached to the electronic apparatus; a circuit board withcircuit components mounted thereon; an insulation sheet spread on thecircuit board; and a support component disposed on the insulating sheetinterposed between the circuit board and the support component therebyproviding a strength to the unit, wherein the insulating sheet has aflange section that is exposed on an edge in the unit connector side andbent to spread on a rear surface of the support component, the flangesection is capable of releasing connection between the main-bodyconnector and the unit connector by being pulled in a direction formoving the unit connector away from the main-body connector.